<template>
  <div>
    <!-- 面包屑导航栏 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog"
            >添加分类</el-button
          >
        </el-col>
      </el-row>

      <!-- 表格 -->
      <tree-table
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
        :show-row-hover="false"
        class="treeTable"
      >
        <!-- 是否有效 列 -->
        <template slot="isOk" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color: lightgreen"
          ></i>
          <i class="el-icon-error" v-else style="color: lightgreen"></i>
        </template>

        <!-- 排序 列 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            type="success"
            size="mini"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag type="warning" size="mini" v-else>三级</el-tag>
        </template>

        <!-- 操作 列 -->
        <template slot="opt" slot-scope="scope">
          <el-button
            type="primary"
            icon="el-icon-edit"
            size="mini"
            @click="showEditCateDialog(scope.row)"
            >编辑</el-button
          >
          <el-button
            type="danger"
            icon="el-icon-delete"
            size="mini"
            @click="removeCateById(scope.row.cat_id)"
            >删除</el-button
          >
        </template>
      </tree-table>

      <!-- 分页区 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>

    <!-- 添加分类 对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <!-- 添加分类的表单 -->
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <el-cascader
            v-model="selectedKeys"
            :options="parentCateList"
            :props="{
              expandTrigger: 'hover',
              value: 'cat_id',
              label: 'cat_name',
              children: 'children',
            }"
            @change="parentCateChanged"
            clearable
            change-on-select
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑分类 对话框 -->
    <el-dialog
      title="编辑分类"
      :visible.sync="editCateDialogVisible"
      width="50%"
    >
      <!-- 编辑分类的表单 -->
      <el-form
        :model="editCateForm"
        :rules="editCateFormRules"
        ref="editCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="editCateForm.cat_name"></el-input>
        </el-form-item>
        <!-- <el-form-item label="分类等级">
          <el-input v-model="editCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="分类名称">
          <el-input v-model="editCateForm.cat_name"></el-input>
        </el-form-item> -->
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      // 数据查询条件
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },

      // 商品分类的数据列表,默认空
      cateList: [],

      //   总数据条数
      total: 0,

      // 为table指定列的定义
      columns: [
        { label: "分类名称", prop: "cat_name" },
        {
          label: "是否有效",
          type: "template",
          template: "isOk",
        },
        {
          label: "排序",
          type: "template",
          template: "order",
        },
        {
          label: "操作",
          type: "template",
          template: "opt",
        },
      ],

      // 控制对话框的显示与隐藏
      addCateDialogVisible: false,
      editCateDialogVisible: false,
      // 添加分类的表单数据对象
      addCateForm: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0,
      },
      // 编辑分类的表单数据对象
      editCateForm: {
        cat_id: 0,
        cat_name: "",
      },
      // 添加分类的验证规则
      addCateFormRules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" },
        ],
      },
      editCateFormRules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" },
        ],
      },
      // 父级分类的列表
      parentCateList: [],
      // 父级分类 选定数组
      selectedKeys: [],
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    //  获取商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.queryInfo,
      });
      if (res.meta.status !== 200)
        return this.$message.error("获取商品分类失败!");

      this.cateList = res.data.result;
      this.total = res.data.total;
      console.log(this.cateList);
    },
    //  监听pagesize改变
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getCateList();
    },
    // 监听pagenum的改变
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage;
      this.getCateList();
    },

    //添加分类 对话框
    showAddCateDialog(date) {
      this.getParentCateList();
      this.addCateDialogVisible = true;
    },

    // 获取父级分类和数据列表
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: {
          type: 2,
        },
      });
      if (res.meta.status !== 200) {
        return this.$message.error("获取父级分类数据失败!");
      }
      this.parentCateList = res.data;
    },
    // 监听选择项变化
    parentCateChanged() {
      // console.log(this.selectedKeys);
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid =
          this.selectedKeys[this.selectedKeys.length - 1];
        this.addCateForm.cat_level = this.selectedKeys.length;
        return;
      } else {
        this.addCateForm.cat_pid = 0;
        this.addCateForm.cat_level = 0;
      }
    },
    addCate() {
      this.$refs.addCateFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post(
          "categories",
          this.addCateForm
        );
        if (res.meta.status !== 201)
          return this.$message.error("添加分类失败!");

        this.$message.success("添加分类成功!");
        this.getCateList();
        this.addCateDialogVisible = false;
      });
    },
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields();
      this.selectedKeys = [];
      this.addCateForm.cat_level = 0;
      this.addCateForm.cat_pid = 0;
    },

    // 删除分类
    async removeCateById(id) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该分类, 是否继续?",
        "确认",
        {
          confirmButtonText: "确认",
          cancelButtonText: "取消",
          type: "warring",
        }
      ).catch((err) => err);

      if (confirmResult !== "confirm") {
        return this.$message.info("已取消操作");
      }
      const { data: res } = await this.$http.delete(`categories/${id}`);
      // console.log(id);
      if (res.meta.status !== 200) return this.$message.error("删除分类失败!");
      this.$message.success("分类删除成功");
      this.getCateList();
    },
    showEditCateDialog(data) {
      this.editCateForm.cat_name = data.cat_name;
      this.editCateForm.cat_id = data.cat_id;
      // console.log(this.editCateForm)
      this.editCateDialogVisible = true;
    },
    async editCate() {
      const { data: res } = await this.$http.put(
        `categories/${this.editCateForm.cat_id}`,
        this.editCateForm
      );
      // console.log(res)
      if (res.meta.status !== 200)
        return this.$message.error("更新商品分类失败!");
      this.$message.success("更新商品分类成功!");
      this.editCateDialogVisible = false;
    },
  },
};
</script>
<style scoped>
.treeTable {
  margin: 15px 0;
}
.el-cascader {
  width: 100%;
}
</style>